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Based on jQuery, let textarea support Ctrl Z step-by-step undo function_jquery

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Release： 2016-05-16 18:01:14

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There is relatively little code.
The main ones are:

Copy code The code is as follows:

 
var log = [] ; 
$(function () { 
var txt = window.setInterval(function () { 
if (log[log.length - 1] != $("#t").val() ) { 
log[log.length] = $("#t").val(); 
} 
}, 1500); 
var isCtrl = false; 
$(document ).keydown(function (e) { 
if (e.which === 17) 
isCtrl = true; 
if (e.which === 90 && isCtrl === true) { 
log.pop(); 
$("#t").val(log[log.length - 1]).blur(); 
} 
}).keyup(function (e ) { 
if (e.which === 17) 
isCtrl = false; 
}); 
}); 

Demo code:

[Ctrl A select all Note:

If you need to introduce external Js, you need to refresh to execute ]

Related labels：

textarea

source：php.cn

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